Readability Scorer
Paste your content and get instant readability scores including Flesch-Kincaid, Gunning Fog, and SMOG Index. See exactly what reading level your audience needs.
Find out how easy your text is to read — in seconds
Paste your content and get instant readability scores including Flesch-Kincaid, Gunning Fog, and SMOG Index. See exactly what reading level your audience needs.
- Six readability formulas calculated instantly: Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau, and Automated Readability Index
- Plain-English explanation of each score — no jargon
- See the recommended audience for your text (general public, college-educated, specialists)
- Word count, sentence count, and syllable stats included
- Works offline in your browser — your content stays private
Enter text to analyze
Paste or type your content above to see readability metrics
Why Use a Readability Scorer?
Readability analysis helps you write content that your audience can actually understand. Studies show that most adults read at an 8th-grade level, yet many websites and documents are written at college level or higher. By checking your readability scores, you can ensure your message reaches its intended audience effectively.
How Readability Formulas Work
- Flesch Reading Ease: 206.835 - 1.015(words/sentences) - 84.6(syllables/words). Higher scores = easier reading.
- Flesch-Kincaid Grade: 0.39(words/sentences) + 11.8(syllables/words) - 15.59. Outputs US grade level.
- Gunning Fog Index: 0.4 × ((words/sentences) + 100 × (complex words/words)). Years of education needed.
- SMOG Index: 1.043 × sqrt(complex words × 30/sentences) + 3.1291. Years of education needed.
- Coleman-Liau Index: 0.0588L - 0.296S - 15.8 where L=letters per 100 words, S=sentences per 100 words.
- Automated Readability Index: 4.71(chars/words) + 0.5(words/sentences) - 21.43. Outputs US grade level.
How the Readability Scorer Works
- Paste your text into the input box
- Click "Analyse" or watch scores update as you type
- See your readability grade level and recommended audience
The tool analyses sentence length, word complexity, and syllable counts to calculate industry-standard readability formulas. Lower grade levels mean more people can understand your writing.
Common Use Cases
- Content marketing: Ensure blog posts and web copy are accessible to your target audience
- Technical writing: Verify documentation matches the expertise level of your readers
- Education: Check that learning materials are appropriate for student grade levels
- Healthcare: Ensure patient information meets health literacy guidelines (typically 6th-8th grade)
- Legal and compliance: Verify contracts and policies meet plain language requirements
Pro tip: Combine multiple metrics for a complete picture. If Flesch-Kincaid says Grade 12 but SMOG says Grade 8, your text has long sentences but simple vocabulary.